Introduction to Psychology: cram pack

Formula sheets, the key method steps for every topic and 8 practice problems, with full solutions at the back.

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1Practice problems

1.Cognitive psychologyMedium

In the Brown–Peterson task, participants count backwards by threes after seeing a trigram such as "KTR". The main finding was that:

  1. ARecall stayed almost perfect even after 18 seconds of counting
  2. BRecall fell sharply within about 18 seconds without rehearsal
  3. COnly the first letter of each trigram tended to be forgotten
  4. DCounting backwards made the trigrams easier to remember
2.Cognitive psychologyHard

In Sperling's experiments, participants saw a 3 × 4 grid of letters briefly. When a tone signalled which row to report immediately afterwards, they could report most letters of that row. What did this show?

  1. AHearing a warning tone improves visual perception of nearby letters in general
  2. BBriefly seen letters are transferred into long-term memory at once
  3. CIconic memory holds only about four letters, however they are tested
  4. DMost of the display is briefly held but fades before it can all be reported
3.Developmental psychologyMedium

An 18-year-old becomes a dentist like her parents expected, without ever considering other options. In Marcia's model, her identity status is:

  1. AIdentity diffusion
  2. BMoratorium
  3. CIdentity achievement
  4. DForeclosure
4.Developmental psychologyHard

Wynn showed 5-month-olds one doll, then a second doll being added behind a screen. When the screen dropped to reveal only one doll, infants looked longer. This suggests infants:

  1. AHave basic expectations about small numbers
  2. BHave already learned to count aloud
  3. CCannot see objects behind screens
  4. DPrefer one doll to two dolls
5.Social psychologyMedium

Everyone laughs at a comedian, Sam laughs at this comedian but at no others, and Sam always laughs at her. Using Kelley's covariation model, the cause is most likely:

  1. AThe comedian
  2. BSam's personality
  3. CChance circumstances
  4. DSam's mood that night
6.Social psychologyHard

In Ross's quiz study, randomly assigned questioners wrote hard questions for contestants. Observers rated the questioners as more knowledgeable. Why is this an attribution error?

  1. AThe contestants knew the answers but chose to hide them
  2. BThe questioners' role advantage was taken as ability
  3. CThe observers believed the roles were assigned by skill
  4. DThe questioners really were more intelligent overall
7.Clinical psychologyMedium

Benzodiazepines reduce anxiety mainly by:

  1. AEnhancing the effect of GABA at GABA-A receptors
  2. BInhibiting monoamine oxidase
  3. CBlocking serotonin reuptake into presynaptic neurons
  4. DBlocking dopamine D2 receptors
8.Clinical psychologyHard

A researcher finds that adoptees whose biological mothers had schizophrenia develop it more often than adoptees whose biological mothers did not, despite being raised by unaffected families. What does this design help to separate?

  1. APositive symptoms from negative symptoms
  2. BGenetic influences from the effects of the rearing environment
  3. CThe effects of antipsychotic medication from the effects of psychological therapy
  4. DDiagnosis by DSM from diagnosis by ICD

2Solutions

1.Cognitive psychology

Answer: B · Recall fell sharply within about 18 seconds without rehearsal

Why this is the answer

Peterson and Peterson (1959) found rapid forgetting from short-term memory without rehearsal. Later work showed proactive interference also plays a role.

Answer

B · Recall fell sharply within about 18 seconds without rehearsal
2.Cognitive psychology

Answer: D · Most of the display is briefly held but fades before it can all be reported

Why this is the answer

Whole report gave about four letters, but partial report showed most of any cued row was available, so nearly the whole grid was briefly held. The advantage disappeared when the tone was delayed by about a second.

Answer

D · Most of the display is briefly held but fades before it can all be reported
3.Developmental psychology

Answer: D · Foreclosure

Why this is the answer

Foreclosure means commitment to goals or values adopted from others without personal exploration. Achievement involves commitment after exploration.

Answer

D · Foreclosure
4.Developmental psychology

Answer: A · Have basic expectations about small numbers

Why this is the answer

Infants seemed to expect 1 + 1 to make 2. Wynn interpreted this as an early sense of number, though some argue simpler perceptual explanations are possible.

Answer

A · Have basic expectations about small numbers
5.Social psychology

Answer: A · The comedian

Why this is the answer

When consensus, distinctiveness and consistency are all high, people attribute the behaviour to the stimulus (the comedian), not the person.

Answer

A · The comedian
6.Social psychology

Answer: B · The questioners' role advantage was taken as ability

Why this is the answer

Observers failed to adjust for the role, which let questioners display knowledge while hiding gaps. This is the fundamental attribution error in action.

Answer

B · The questioners' role advantage was taken as ability
7.Clinical psychology

Answer: A · Enhancing the effect of GABA at GABA-A receptors

Why this is the answer

Benzodiazepines increase GABA-A receptor activity, producing rapid calming effects. Because of tolerance and dependence, they are usually recommended only for short-term use.

Answer

A · Enhancing the effect of GABA at GABA-A receptors
8.Clinical psychology

Answer: B · Genetic influences from the effects of the rearing environment

Why this is the answer

Adoption studies, such as Heston's and the Danish studies, separate genetic risk from family environment because the child is raised away from the biological parent.

Answer

B · Genetic influences from the effects of the rearing environment

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